Samsung is set to launch a new range of Galaxy tablets to replace the Tab3 series.

The new range will available in the second-quarter worldwide and will include a Wi-Fi and 4G LTE version, the range will consists of three models with 10.1-inch, 8-inch and 7-inch screen sizes with 16:1- aspect ratio. Each will be available in black or white. Australian prices and ship dates weren't announced overnight.

Compared to their predecessors, the new models add Android 4.4 OS, quad-core CPUs instead of dual-core CPUs, thinner bezels, lighter weight, and a capacitive recent-apps button below the touchscreen for easier multitasking and quick app switching, a spokesman said. The recent-apps button was introduced on the Note Pro and Tab Pro step-up tablets announced earlier this year and also on the Galaxy S5 smartphone.

Each of the three new models sports 1.2GHz quad-core processor, whereas the Tab 3 7.0 featured 1.2GHz dual core, the Tab 3 8.0 featured 1.5GHz dual core, and the Tab 3 10.1 featured 1.6GHz dual core.

In other upgrades, RAM and screen resolution go up in select Tab4 models, and the simultaneous display of two apps at a time expands to all models from one model.

In the Tab3 series, only the 8.0 lets users display two apps at a time in separate windows. Also in the Tab3 line, the 7.0 and 10.1 models featured 1GB RAM, and the 8.0 model featured 1.5GB RAM. But in the Tab4 series, all models feature 1.5GB RAM.

In the Tab3 line, the 8.0 and 10.1 models had 1,280 by 800 screens, and the 7.0 had 1,024 by 600 resolution. In the Tab 4 series, however, all three feature 1,280 by 800 WXGA resolution.